Comment by RobertKerans

afaik there's nothing tying it specifically to GH (where the metatada is), and then the actual code is just in an S3 bucket, so in theory should be reasonably easy [ha!] to just host anywhere. In theory, I mean that's a massive lump of stuff, and surely wherever it gets hosted is going to face exactly the same issues (though if it does become very widely used, then you'd think every major provider that controls infra could easily have a mirror)